Does it have a monthly fee to use app?

Arlo offers two weeks rolling recording for free, more storage can be added for a subscription fee.

Does this support RTSP? If I want to use with my own backend rather than subscription?

no arlo service only, free service retains two weeks, records when there is movement, continuous recording can be initiated manually, recordings can be downloaded.

Does this support RTSP? If I want to use with my own backend rather than subscription?

no arlo service only, free service retains two weeks, records when there is movement, continuous recording can be initiated manually, recordings can be downloaded.

How long is the Power Cable and is it Magnetic Connect?

I believe the cable is nearly seven feet long, definitely over six feet. The connection is a standard micro-USB connection, not magnetic.

Arlo Camera BUNDLE VM2030136001BN - 1 Arlo Essential Spotlight Wireless Camera + 1 Arlo Essential Solar Panel

Arlo Essential Solar Panel Charger included
Arlo's Essential security camera records video in 1080p for a clear picture and see more of your property thanks to the wide 130º viewing angle.Controller Type:Amazon Alexa;Vera.Connectivity protocol:Wi-Fi.Power source type:Battery Powered
Receive notifications from your home security cameras for people, vehicles, and packages so you can take quick action such as sound the siren, call a friend or dial emergency services, with the included, Arlo Secure trial.
Hear and speak to visitors at your with clear, two-way audio and can be easily used as a baby monitor with camera and audio, nanny cam, and pet camera
100% wireless design - Simplify your home security system by utilizing Arlo's wifi camera capability to connect directly to your Wi-Fi for fast, wire-free installation with no hub required
Weather-resistant outdoor camera for year-round security - The wireless camera is certified and tested to withstand the toughest conditions